PD70F3826_15 Datasheet, PDF (63/75 Pages) Renesas Technology Corp – RENESAS MCU

μ PD70F3826, 70F3827, 70F3828, 70F3829, 70F3830, 70F3831, 70F3832, 70F3833, 70F3834, 70F3835, 70F3836, 70F3837
24. STANDBY FUNCTION
24. STANDBY FUNCTION
The power consumption of the system can be effectively reduced by using the standby modes in combination and
selecting the appropriate mode for the application. The available standby modes are listed in Table 24-1.
Table 24-1. Standby Modes
Mode
Function Overview
HALT mode
IDLE1 mode
Mode to stop only the operating clock of the CPU
Mode to stop all the operations of the internal circuit except the oscillator, PLL operation^Note,
and flash memory
IDLE2 mode
Mode to stop all the operations of the internal circuit except the oscillator
STOP mode
Mode to stop all the operations of the internal circuit except the subclock oscillator
Subclock operation mode
Mode to operate internal system clock by subclock
Sub-IDLE mode
Mode to stop all the operations of the internal circuit except the oscillator in subclock
operation mode
Note PLL retains the previous operation status.
The following figure shows the status transitions of the standby function.
Sub-IDLE mode
(fx operates, PLL operates)
Internal oscillation
clock operation
Reset
WDT overflow
Oscillation
stabilization wait
Subclock operation mode
(fx operates, PLL operates)
Clock through mode
(PLL operates)
Normal operation mode
HALT mode
(fx operates, PLL operates)
Oscillation
stabilization wait
PLL mode
(PLL operates)
PLL lockup
time wait
Clock through mode
(PLL stops)
IDLE1 mode
(fx operates, PLL operates)
Subclock operation mode
(fx stops, PLL stops)
Oscillation
stabilization wait
Oscillation
stabilization wait
HALT mode
(fx operates, PLL stops)
IDLE1 mode
(fx operates, PLL stops)
Sub-IDLE mode
(fx stops, PLL stops)
IDLE2 mode
(fx operates, PLL stops)
STOP mode
(fx stops, PLL stops)
Remark fX: Main clock oscillation frequency
R01DS0029EJ0001 Rev.0.01
Sep 30, 2010
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